feat: add REdgeInsetsDirectional

@@ -79,3 +79,52 @@ class REdgeInsets extends EdgeInsets {
           top: top.r,
         );
 }
+
+class REdgeInsetsDirectional extends EdgeInsetsDirectional {
+  /// Creates insets where all the offsets are `value`.
+  ///
+  /// {@tool snippet}
+  ///
+  /// Adapt eight-pixel margin on all sides:
+  ///
+  /// ```dart
+  /// const REdgeInsetsDirectional.all(8.0)
+  /// ```
+  /// {@end-tool}
+  REdgeInsetsDirectional.all(double value) : super.all(value.r);
+
+  /// Creates insets with only the given values non-zero.
+  ///
+  /// {@tool snippet}
+  ///
+  /// Adapt margin indent of 40 pixels on the leading side:
+  ///
+  /// ```dart
+  /// const REdgeInsetsDirectional.only(start: 40.0)
+  /// ```
+  /// {@end-tool}
+  REdgeInsetsDirectional.only({
+    double bottom = 0,
+    double end = 0,
+    double start = 0,
+    double top = 0,
+  }) : super.only(
+          bottom: bottom.r,
+          start: start.r,
+          end: end.r,
+          top: top.r,
+        );
+
+  /// Creates adapt insets from offsets from the start, top, end, and bottom.
+  REdgeInsetsDirectional.fromSTEB(
+    double start,
+    double top,
+    double end,
+    double bottom,
+  ) : super.fromSTEB(
+          start.r,
+          top.r,
+          end.r,
+          bottom.r,
+        );
+}